Possible charge ordering and anomalous transport in graphene/graphene quantum dot heterostructure

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dc.contributor.authorRoy, Rajarshics
dc.contributor.authorHolec, Davidcs
dc.contributor.authorMichal, Lukášcs
dc.contributor.authorHemzal, Dušancs
dc.contributor.authorSarkar, Saikatcs
dc.contributor.authorKumar, Gundam Sandeepcs
dc.contributor.authorNečas, Davidcs
dc.contributor.authorDhankhar, Meenacs
dc.contributor.authorKaushik, Preetics
dc.contributor.authorGomez Perez, Inmaculada Jennifercs
dc.contributor.authorZajíčková, Lenkacs
dc.coverage.issue26cs
dc.coverage.volume36cs
dc.date.accessioned2024-10-14T09:04:06Z
dc.date.available2024-10-14T09:04:06Z
dc.date.issued2024-06-03cs
dc.description.abstractObservations of superconductivity and charge density waves (CDW) in graphene have been elusive thus far due to weak electron-phonon coupling (EPC) interactions. Here, we report a unique observation of anomalous transport and multiple charge ordering phases at high temperatures ( T 1 similar to 213 K , T 2 similar to 325 K ) in a 0D-2D van der Waals (vdW) heterostructure comprising of single layer graphene (SLG) and functionalized (amine) graphene quantum dots (GQD). The presence of functionalized GQD contributed to charge transfer with shifting of the Dirac point similar to 0.05 eV above the Fermi level (ab initio simulations) and carrier density n similar to - 0.3 x 10 12 cm - 2 confirming p-doping in SLG and two-fold increase in EPC interaction was achieved. Moreover, we elucidate the interplay between electron-electron and electron-phonon interactions to substantiate high temperature EPC driven charge ordering in the heterostructure through analyses of magnetotransport and weak anti-localization (WAL) framework. Our results provide impetus to investigate strongly correlated phenomena such as CDW and superconducting phase transitions in novel graphene based heterostructures.en
dc.formattextcs
dc.format.extent265601-cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationJournal of Physics Condensed Matter. 2024, vol. 36, issue 26, p. 265601-.en
dc.identifier.doi10.1088/1361-648X/ad31bfcs
dc.identifier.issn1361-648Xcs
dc.identifier.orcid0000-0001-7731-8453cs
dc.identifier.orcid0000-0002-1858-0926cs
dc.identifier.orcid0000-0002-6906-8906cs
dc.identifier.other188421cs
dc.identifier.researcheridD-7166-2012cs
dc.identifier.researcheridE-3010-2012cs
dc.identifier.urihttps://hdl.handle.net/11012/249532
dc.language.isoencs
dc.publisherIOP Publishing Ltdcs
dc.relation.ispartofJournal of Physics Condensed Mattercs
dc.relation.urihttps://iopscience.iop.org/article/10.1088/1361-648X/ad31bfcs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1361-648X/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectgrapheneen
dc.subjectgraphene quantum dotsen
dc.subjectheterostructureen
dc.subjectcharge orderingen
dc.subjectRaman spectroscopyen
dc.subjectlow temperature transporten
dc.subjectab initio simulationen
dc.titlePossible charge ordering and anomalous transport in graphene/graphene quantum dot heterostructureen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
eprints.grantNumberinfo:eu-repo/grantAgreement/MSM/LM/LM2023051cs
sync.item.dbidVAV-188421en
sync.item.dbtypeVAVen
sync.item.insts2024.10.14 11:04:06en
sync.item.modts2024.09.19 11:32:08en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Plazmové technologie pro materiálycs
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